Is there a connection between emotions and physical pain?

When I hear someone make a negative comment about me it sometimes sticks and for some reason my chest will begin to hurt. A friend of mine said it was emotional shock. For a while the feeling went away, but then it got worse. Now the pain will range from my heart to my left arm, depending on how badly (depressed) I feel. In general, I want to know if I should be concerned or if it's just as my friend says: "emotional shock," that's just gotten worse.


How many times a day do people typically get erections?

Should a normal man's penis become erect for a certain number of times throughout one day (without any external stimulus)? Or, do these erections occur only while a man is sleeping? I have been masturbating once every day or every other day, and I have noticed that I rarely get any of those spontaneous erections during the day at all. Plus, I have been waking up with no morning erection during the past week. Have I been masturbating too much?


Why are my nipples hard?

Is there a reason behind spontaneous nipple hard-ons? Lately one of my nipples just stays that way for the majority of the day. It's irritating! Is there a reason behind it?


Why do I experience pain after masturbating at night?

Sometimes I masturbate before I go to sleep at night. Usually nothing is wrong, but sometimes (and this always occurs at night, I've found) after I masturbate, a few minutes later I have to urinate. And when I do, it is usually very painful. The feeling doesn't pass either. My scrotum usually gets very tightened up, and there is painful feeling above my crotch. Usually I just sit there, drink some water until the feeling goes away. ANY idea what this is?